DE102011051923A1 - Device for monitoring a conveyor system for detecting damage to a conveyor belt by means of sequential conductor loops and a sequential slot protection system - Google Patents

Abstract

The invention relates to a device for continuous and non-destructive monitoring of a conveyor system (1) with the following components: - an endless closed conveyor belt (2) with a support-side cover plate (3) and running side cover plate (4) each made of a polymeric material having elastic properties and with an embedded tension member; - Drums (5, 6), carrying rollers and carrying racks, wherein the aforementioned components in connection with the conveyor belt (2) a material-conveying upper run (A) with a feed point (7) and delivery point for the conveying material and a material-conveying or material-free lower run (B) form; - A conductor loop package (8) with endless closed conductor loops (9, 10), which is embedded in the conveyor belt (2); and - an electronic slot protection system for non-contact detection of damage to the conveyor belt (2), the slot protection system being an electrical equipment system comprising at least one interrogation station (11) and at least one slot monitoring station (12) connected to a central controller (13), which controls the entire conveyor system (1). The device according to the invention is equipped as part of a conductor loop package (8) with sequential conductor loops (9, 10) and a sequential slot protection system, the functional logic of which is described in detail.

Description

• – einem endlos geschlossenen Fördergurt mit einer tragseitigen und laufseitigen Deckplatte aus jeweils einem polymeren Werkstoff mit elastischen Eigenschaften sowie mit einem eingebetteten Zugträger;
• – Trommeln, Tragrollen und Traggerüste, wobei die vorgenannten Bauteile in Verbindung mit dem Fördergurt ein materialförderndes Obertrum mit einer Aufgabestelle und Abgabestelle für das Fördermaterial und ein materialförderndes oder materialfreies Untertrum bilden;
• – einem Leiterschleifen-Paket mit endlos geschlossenen Leiterschleifen, das im Fördergurt eingebettet ist; sowie
• – einem elektronischen Schlitzschutzsystem zur berührungslosen Erfassung von Schäden des Fördergurtes, wobei das Schlitzschutzsystem ein elektrisches Gerätesystem ist, das wenigstens eine Abfragestation sowie wenigstens eine Schlitzüberwachungsstation umfasst und dabei an eine Zentralsteuerung angeschlossen ist, die die gesamte Förderanlage steuert.

The invention relates to a device for continuous and non-destructive monitoring of a conveyor system with the following components:

• - An endlessly closed conveyor belt with a support-side and running-side cover plate each made of a polymeric material having elastic properties and with an embedded tensile member;
• - Drums, carrying rollers and shoring, wherein the aforementioned components in conjunction with the conveyor belt form a material-promoting upper strand with a feed point and delivery point for the conveying material and a material-conveying or material-free lower strand;
• A conductor loop package with endlessly closed conductor loops embedded in the conveyor belt; such as
• - An electronic slot protection system for non-contact detection of damage to the conveyor belt, the slot protection system is an electrical equipment system comprising at least one interrogation station and at least one slot monitoring station, while connected to a central control that controls the entire conveyor.

As regards the construction of a conveyor belt, reference is made in particular to the following patent documents: DE 25 20 943 A1 DE 38 01 120 A1 DE 25 32 190 A1 DE 43 33 839 A1 DE 44 36 042 A1 EP 0 753 471 A1 EP 0 336 385 A1 WO 2008/034483 A1

The support-side and running-side cover plates usually each consist of a rubber mixture containing a rubber component or a rubber component blend, a crosslinking agent or a crosslinking system comprising a crosslinking agent and an accelerator, and usually further Mischingingredienien, in particular a filler and / or a processing aid and / or an anti-aging agent and / or a plasticizer and / or other additives (eg fibers, color pigments). The relevant rubber base is in particular:
Natural rubber (NR)
Butadiene rubber (BR)
Chloroprene rubber (CR)
Styrene butadiene rubber (SBR)
Nitrile rubber (NBR)
Butyl rubber (IIR)
Ethylene-propylene rubber (EPM)
Ethylene-propylene-diene rubber (EPDM)
SBR / NR blend
SBR / BR blend
NR / BR blend

Of particular importance to date is CR, which is characterized by high resistance to fire, weathering and aging, in particular for conveyor belts used in underground mining. In surface mining, NR and the abovementioned blends ( DE 10 2009 043 904 A1 ) has become more important.

Due to the vulcanization of a rubber mixture of the type mentioned above, the conveyor belt receives the required elastic properties.

As embedded tension members, steel or aramid ropes running in the longitudinal direction of the conveyor belt are used, ropes made of steel being of particular importance. In particular in connection with steel cable conveyor belts, an embedded transverse reinforcement made of synthetic cords, for example of polyamide, is additionally used for slot protection ( WO 2008/034483 A1 ). The tension member may also be a textile fabric, in particular a single-layer or multi-layer fabric, for example a polyester-polyamide fabric.

In most cases, the leadership of a conveyor belt takes place in a conveyor system in an open form, in the context of a domed carrying roller chair.

In the last 20 years, however, the closed conveyor system has been further developed using a tubular conveyor belt. The system components are in the closed conveyor system in addition to the drums (drive drum, reversing drum), carrying rollers and shoring mostly correction rollers and a hold-down roller when closing the conveyor belt. In this regard, reference is made in particular to the following patent literature: DE 36 06 129 A1 DE 10 2009 003 552 A1 DE 36 12 765 A1 EP 0 336 385 A1 DE 43 33 839 B4

Other components of a conveyor may be a task chute, discharge chute, idler pulleys and chase seals made of a polymeric material.

Conveyor belts are heavily stressed when impacting the conveying material, for example ores. This often causes damage to the support-side cover plate of the conveyor belt, in the form of cuts, material chipping or other damage. These are critical for the life of the conveyor belt and must therefore be recognized as early as possible. Wear due to abrasion can also occur in the run-side cover plate with contact with the drums and idlers and optionally to other roller components mentioned above. In addition, in a steel cable conveyor belt, the run-side cover plate can be slashed under extreme loads through the steel cables, the already presented Synthetic cord cross-arming offers - albeit not always - sufficient slot protection. Ultimately, the tension member can be damaged in a continuous operation, which can have a negative impact on the tensile force of a conveyor belt.

• – Die Druckschriften DE 44 44 264 C1 , DE 197 15 703 A1 , DE 10 2009 025 848 A1 , WO 02/40 384 A1 , WO 2005/030621 A1 und US 4 621 727 beschreiben einen Ansatz, bei der die Fördergurte mit Leiterschleifen in regelmäßigen Abständen versehen werden, deren Beschädigungen durch elektroinduktive Messverfahren detektiert werden können. Anstelle der Leiterschleifen oder in Kombination mit diesen können auch Transponder zum Einsatz gelangen. Was die bedeutsame Leiterschleifentechnologie und die hiermit verbundenen Probleme betrifft, wird an einer anderen Stelle noch näher eingegangen.
• – Die Druckschriften DE 195 39 980 A1 und EP 0 787 669 B1 beschreiben eine Überwachungseinrichtung unter Verwendung von quer zur Förderrichtung in den Fördergurt eingebauten Überwachungselementen und Identifikationselementen, die bei Vorbeiführen an ortsfesten Leseeinrichtungen sowohl den Zustand als auch die Position melden. Dieses Überwachungskonzept ist jedoch in seiner Umsetzung sehr aufwendig.
• – Die Offenlegungsschrift DE 198 40 081 A1 stellt ein System zur Überwachung einer einem Verschleiß unterworfenen Schicht vor. So wird beispielsweise eine ferromagnetische Schicht in die tragseitige und/oder laufseitige Deckplatte eingebettet, die das Signal eines darunter liegenden Transponders abschirmt, es sei denn, dass diese Schicht beschädigt ist. Auch dieses Überwachungskonzept ist sehr aufwendig und nur auf speziell ausgerüstete Fördergurte anwendbar.
• – Die Kontrolle des Zustandes der Stahlseile in Fördergurten erfolgt durch ein außen vorbeigeführtes induktives Feld ( DE 199 21 224 A1 ) oder durch ein magnetisches Feld ( DE 10 2006 036 668 A1 ). Nachteilig ist, dass hiermit nur Beschädigungen der Stahlseilstrukturen erfassbar sind.
• – Bei der Überwachung der Beschädigungen der tragseitigen und/oder laufseitigen Deckplatte kommen opto-elektronische Systeme, insbesondere in Form einer Zeilen- oder Flächenkamera, zum Einsatz, wobei diesbezüglich insbesondere auf folgende Patentliteratur verwiesen wird:

DE 24 13 543 A1 DE 101 29 091 A1 DE 42 40 094 A1 DE 101 40 920 A1 DE 100 29 545 A1 EP 1 187 781 B1 DE 100 48 552 A1 WO 2005/023688 A1 DE 101 00 813 A1 WO 2008/031648 A1 Die hier dokumentierten umfangreichen Entwicklungsarbeiten unterstreichen die zunehmende Bedeutung dieser Überwachungseinrichtung. Neben dem großen technischen Aufwand ist dieses Überwachungskonzept jedoch von einer Fördergurtoberfläche ohne wesentliche Verschmutzung abhängig. Aus diesem Grunde wird das opto-elektronische System zusätzlich mit einer Freiblasvorrichtung versehen, was jedoch die Grenzen der Wirtschaftlichkeit aufzeigt.

• – Ferner ist eine Einrichtung zur zerstörungsfreien Inspektion eines Fördergurtes mittels energiereicher Strahlen, insbesondere Röntgenstrahlen, bekannt, wobei diesbezüglich insbesondere auf folgende Patentliteratur verwiesen wird:

DE 35 17 314 A1 JP 04158208 A (Patent Abstracts of Japan) WO 2006/066519 A1 JP 2000292371 A (Patent Abstracts of Japan) Nachteilig ist, dass bei derartigen Strahlen aus Sicherheitsgründen das Überwachungssystem in ein Gehäuse integriert werden muss, was ebenfalls die Grenzen der Wirtschaftlichkeit aufzeigt.
Ferner wird bei diesem Überwachungseinrichtung vorrangig das Innenleben eines Fördergurtes, insbesondere die eingebetteten Stahlseile, erfasst. In addition to the regular visual inspection, there are various systems for monitoring the state of the conveyor belt during operation of a conveyor system. An outline of the related art is given below:

• - The pamphlets DE 44 44 264 C1 . DE 197 15 703 A1 . DE 10 2009 025 848 A1 . WO 02/40 384 A1 . WO 2005/030621 A1 and U.S. 4,621,727 describe an approach in which the conveyor belts are provided with conductor loops at regular intervals, the damage of which can be detected by electro-inductive measuring methods. Instead of the conductor loops or in combination with these, transponders can also be used. Concerning the significant conductor loop technology and the problems associated with it, will be discussed in more detail elsewhere.
• - The pamphlets DE 195 39 980 A1 and EP 0 787 669 B1 describe a monitoring device using transversely to the conveying direction in the conveyor belt built-in monitoring elements and identification elements that report both the state and the position when passing on stationary reading devices. However, this monitoring concept is very complicated in its implementation.
• - The publication DE 198 40 081 A1 presents a system for monitoring a layer subject to wear. Thus, for example, a ferromagnetic layer is embedded in the support-side and / or run-side cover plate, which shields the signal of an underlying transponder, unless this layer is damaged. This monitoring concept is very complex and only applicable to specially equipped conveyor belts.
• - The condition of the steel cables in conveyor belts is controlled by an inductive field ( DE 199 21 224 A1 ) or by a magnetic field ( DE 10 2006 036 668 A1 ). The disadvantage is that hereby only damage to the steel cable structures can be detected.
• - When monitoring the damage of the support side and / or running side cover plate opto-electronic systems, in particular in the form of a line or area camera, are used, in which reference is made in particular to the following patent literature:

DE 24 13 543 A1 DE 101 29 091 A1 DE 42 40 094 A1 DE 101 40 920 A1 DE 100 29 545 A1 EP 1 187 781 B1 DE 100 48 552 A1 WO 2005/023688 A1 DE 101 00 813 A1 WO 2008/031648 A1 The extensive development work documented here underlines the increasing importance of this monitoring device. In addition to the great technical effort, this monitoring concept However, depending on a conveyor belt surface without significant contamination. For this reason, the opto-electronic system is additionally provided with a blow-off device, which, however, shows the limits of cost-effectiveness.

• Furthermore, a device for non-destructive inspection of a conveyor belt by means of high-energy radiation, in particular X-rays, is known, reference being made in this regard in particular to the following patent literature:

DE 35 17 314 A1 JP 04158208 A (Patent Abstracts of Japan) WO 2006/066519 A1 JP 2000292371 A (Patent Abstracts of Japan) The disadvantage is that with such beams for safety reasons, the monitoring system must be integrated into a housing, which also shows the limits of cost-effectiveness.
Furthermore, the inner life of a conveyor belt, in particular the embedded steel cables, is primarily detected in this monitoring device.

Of particular importance has the monitoring of a conveyor belt obtained by means of a slot protection system using the aforementioned conductor loops, which will now be discussed in more detail below on the previous slot protection technology.

A conductor loop or conductor loop package is a package consisting of one or more endlessly connected (shorted) loops (contours) of any shape, for example meandering, rectilinear, rectangular or 8-shaped. The contours can be made of various materials and construction elements, such as a steel cord, a conductive textile thread, or a conductive polymer. They are embedded in the polymer package of the conveyor belt. The conductor loop or the conductor loop package can be vulcanized during the production of a conveyor belt or subsequently in the support side and / or running side cover plate of a conveyor belt, and usually at a distance of 50 to 200 m. A conductor loop works according to the principle of electromagnetic induction.

With regard to the conductor loop technology and the conductor loop form, reference is made in particular to the following patent literature: DE 38 11 533 A1 DE 199 02 508 A1 DE 39 27 746 A1 DE 101 00 249 A1 DE 40 12 906 A1 EP 0 213 057 A1 DE 40 13 764 A1 WO 2005/030621 A1 DE 40 14 475 A1 WO 2010/133387 A1

In the following two publications, the conductor loop package is described in detail using frequently used conductor loop shapes:
In the published patent application EP 0 213 057 A1 the conductor loop is 8-shaped, in the context of multiple turns.

In the published patent application WO 2005/030621 A1 a conductor loop package is presented which comprises a first conductor loop. Within this first conductor loop, a second conductor loop is arranged. If appropriate, a third conductor loop can be incorporated within this second conductor loop.

The slot protection system is an electrical device system which comprises at least one interrogation station, in particular in the form of a transmitter / receiver pair, at least one slot monitoring station, for example in the form of a scanner, and usually additionally at least one proximity initiator and / or at least one transponder and works according to the following principle :
During plant operation, the conductor loops are polled from a polling station by a combination of a transmitter and a receiver and a slot monitoring station. When a conductor loop passes the interrogation station, an electromagnetic signal is transmitted from the transmitter to the receiver by means of intact contours. The transmitter generates a changing magnetic field that generates a current in the conductive shorted contours of a conductor loop. This current in turn generates a magnetic field that is registered by the receiver, that is, according to the principle of electromagnetic induction. If the conveyor belt slotted in the conveying direction and thus the contour or contours of Conductor loop is destroyed, no signal is transmitted from the transmitter to the receiver. The slot monitoring station sends a signal to the central control of the conveyor, in which case the conveyor belt is stopped. This also limits the extent of the damage. The position of conductor loops is determined independently of the conveyor belt speed and of the conveyor belt running direction absolutely and relative to the adjacent conductor loops by means of at least one proximity sensor, for example located on a drum. There are also positioning solutions based on at least one transponder. The slot protection system is connected to the central control of a conveyor system that controls the entire conveyor system.

The main task of each conductor loop slot protection system is mainly to stop a conveyor system when a longitudinal slot or a large Fördergurtschaden arises in the conveying direction. Limited conveyor belt notches or punctures must not be the cause, as a result of which a damaged conductor loop becomes the cause for stopping a conveyor system.

Because the contours in a commercial conductor loop package, for example, according to the teaching EP 0 213 057 A1 and WO 2005/030621 A1 , are very close to each other, there is a risk that all contours of the entire conductor loop package may fail due to a one-time local damage. Consequently, in such a package construction unwanted plant downtime and loss of time to be feared at the plant operator.

In the background of the above-mentioned overall problem, the object is to provide a generic device for monitoring a conveyor system, in which the life of conductor loops is increased, combined with a slot protection principle, the unwanted conveyor failures and the associated loss of time, not through longitudinal slots caused, minimized.

This object is achieved in that the conductor loop package has at least two sequential conductor loops, which are arranged in the longitudinal direction of the conveyor belt at a distance, wherein the slot monitoring station of a sequential slot protection system as a signal a combination of a first signal for an intact conductor loop and a second Provides a signal for a damaged or damaged conductor loop, the sequential slot protection system operating to provide a warning signal upon destruction or damage of a conductor loop in at least one intact conductor loop within the conductor loop package, associated with action at the next repair and inspection work; while in the destruction or damage of all conductor loops of the conductor loop package, the conveyor belt is stopped.

In the following, the functional logic of the sequential slot protection system is explained in more detail with reference to a conductor loop package with two or three sequential conductor loops.

The slot monitoring station, for example in the form of a scanner, provides as a signal a combination of "0" or "1", where "1" indicates an intact and "0" a broken or damaged conductor loop. If all conductor loops are undamaged, the slot monitoring station supplies the signal "11" in the presence of two conductor loops or the signal "111" from three conductor loops. Now, if a conductor loop of a looped package is cracked or damaged, the slit monitoring system provides a warning signal "10" or "01" for a two-loop packet and a warning signal "101" or "011" or "3" for a three-loop packet "110". Such a warning signal indicates that during the next repair and inspection work, this conductor loop package or a part of it should be replaced. However, the conveyor belt is stopped only when the slot protection system provides the warning signal on a two loop packet "00" and a three loop packet "000". As a result, the likelihood that two or three conductor loops in a conductor loop package will fail simultaneously due to a local conveyor belt damage will be very low. Consequently, unwanted conveyor failures and associated time losses that are not caused by longitudinal slots can be minimized.

A required electronic slot protection system can be constructed similar to a commercially available slot protection system, but differs in the functional logic described above.

The distance between two sequential conductor loops in a conductor loop package should preferably be chosen so that it gives more than the maximum grain size d _{Kmax of} the conveying material. This distance is filled with a polymeric material, for example with a rubber mixture based on CR. However, this makes a sequential conductor loop compared to a commercial Conductor loop only slightly more expensive. Depending on the conductor loop design, the shorted contours may have different shapes, for example meandering.

The maximum grain size d _{Kmax of} a conveyor material in the conveyor belt technology is usually between 0 and 400 mm. Depending on the conveyor belt width b and the percentage grain size distribution, the maximum grain size must not exceed d _Kmax ≤ b / (3 ... 4). For example, assuming the maximum conveyor belt width b = 3200 mm, the maximum grain size should be in the interval 800 mm ≤ d _Kmax ≤ 1067 mm lie. In this regard, reference is made to the following literature: "Continuous conveyor" by Pajer, Kuhnt and Kurth, 4th, heavily edited edition, VEB Verlag Technik Berlin, 1983 ,

For particularly high loads from the material to be conveyed, for example due to a collision of large pieces of material at the point of application in installations with a short center distance, a conductor loop package can be reinforced with a transverse reinforcement, as long as the cover plate thickness, in particular that of the support-side cover plate, permits. Appropriately, here is a textile fabric, in particular in the form of a fabric, in particular again in the form of a polyamide-polyester fabric used.

The invention will now be explained by means of exemplary embodiments with reference to schematic drawings. Show it:

1 a conveyor system with sequential conductor loops and a sequential slot protection system;

2 a conductor loop package with two sequential conductor loops;

3 a conductor loop package with three sequential conductor loops.

1 shows a conveyor system 1 with a conveyor belt 2 comprising a support-side cover plate 3 and a running cover plate 4 each of a polymeric material having elastic properties, for example a vulcanized rubber compound based on CR, and an embedded tensile member, for example in the form of steel cables.

In the direction of travel (arrow), the conveyor belt 2 around the drums 5 and 6 guided. In the closer area of the drum 5 there is the Aufgabestelle 7 for the conveying material. The drum 6 where the conveyor belt 2 is transferred from the upper strand A in the lower strand B, and that with simultaneous ejection of the conveying material, here is also the drive drum. Alternatively, the drum can 5 take over the drive function. The running side cover plate 4 is supported within the upper run A and the lower run B on carrying roles.

In the support-side cover plate 3 and / or running side cover plate 4 , in particular within the support-side cover plate, are several conductor loop packages 8th embedded. Each conductor loop package consists of two endless closed conductor loops 9 and 10 which are arranged one behind the other in the conveyor belt longitudinal direction at a distance. This two-loop package will be used in conjunction with the 2 explained in more detail.

The slot protection system comprises at least one interrogation station 11 in the form of a transmitter S / receiver E pair, a slot monitor station 12 as well as a central control 13 with integrated process computer. Another component of the slot monitoring system is at least one proximity initiator and / or at least one transponder. The proximity initiator, its significance in conveyor systems, in particular in the published patent application EP 1 283 182 A1 is described in detail, is located for example on the drum 5 , The transponder is in the carrier-side cover plate 3 and / or running side cover plate 4 of the conveyor belt 2 embedded. In this regard, reference is made to the aforementioned transponder technology.

Within a conductor loop package 8th work the two conductor loops 9 and 10 sequentially, detecting a sequential slot protection system. The slot monitoring station 12 supplies as signal a combination of "0" or "1", where "1" signals an intact and "0" a destroyed or damaged conductor loop. Provides, for example, the slot monitoring station for the two conductor loops 9 and 10 the signal "11", both conductor loops are undamaged. If a conductor loop of a looped package is cracked or damaged, the slot protection system provides a warning signal "10" or "01", associated with appropriate action during the next repair and inspection work. The conveyor belt 2 but is only stopped when the system delivers the warning signal "00".

2 shows again the conductor loop package 8th with the two sequential conductor loops 9 and 10 , Within this two-loop package, the two endlessly closed conductor loops run meandering. In Fördergurtlängsrichtung the two conductor loops are arranged at a distance X successively. This distance is greater than the maximum grain size d _{kmax of} the conveying material. _With regard to the interval range of d _kmax , _reference is made to what has already been mentioned.

3 now shows a conductor loop package 14 with three sequential conductor loops 15 . 16 and 17 , Within this three-loop package, the three endless loop loops are also meandering. In Fördergurtlängsrichtung two conductor loops are arranged at a distance X successively. The distance between the conductor loops 15 and 16 as well as between 16 and 17 are preferably the same. With regard to the distance parameters, the same applies here as with the conductor strip package 8th according to 2 , However, the conveyor belt is only stopped when the slot protection system provides the warning signal "000", but not, for example, a warning signal "101".

LIST OF REFERENCE NUMBERS

1

conveyor system

2

conveyor belt

3

load-bearing cover plate

4

running side cover plate

5

drum

6

drum

7

Delivery point for the conveying material

8th

Conductor loop package in the form of a two-loop package

9

conductor loop

10

conductor loop

11

Polling station in the form of a transmitter / receiver pair

12

Slot monitoring station

13

Central control

14

Conductor loop package in the form of a three-loop package

15

conductor loop

16

conductor loop

17

conductor loop

A

obertrum

B

strand

e

receiver

S

transmitter

X

Distance between two conductor loops

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 2520943 A1 [0002]
• DE 3801120 A1 [0002]
• DE 2532190 A1 [0002]
• DE 4333839 A1 [0002]
• DE 4436042 A1 [0002]
• EP 0753471 A1 [0002]
• EP 0336385 A1 [0002, 0008]
• WO 2008/034483 A1 [0002, 0006]
• DE 102009043904 A1 [0004]
• DE 3606129 A1 [0008]
• DE 102009003552 A1 [0008]
• DE 3612765 A1 [0008]
• DE 4333839 B4 [0008]
• DE 4444264 C1 [0011]
• DE 19715703 A1 [0011]
• DE 102009025848 A1 [0011]
• WO 02/40384 A1 [0011]
• WO 2005/030621 A1 [0011, 0014, 0016, 0019]
• US 4621727 [0011]
• DE 19539980A1 [0011]
• EP 0787669 B1 [0011]
• DE 19840081 A1 [0011]
• DE 19921224 A1 [0011]
• DE 102006036668 A1 [0011]
• DE 2413543 A1 [0011]
• DE 10129091 A1 [0011]
• DE 4240094 A1 [0011]
• DE 10140920 A1 [0011]
• DE 10029545 A1 [0011]
• EP 1187781 B1 [0011]
• DE 10048552 A1 [0011]
• WO 2005/023688 A1 [0011]
• DE 10100813 A1 [0011]
• WO 2008/031648 A1 [0011]
• DE 3517314 A1 [0011]
• JP 04158208 A [0011]
• WO 2006/066519 A1 [0011]
• JP 2000292371 A [0011]
• DE 3811533 A1 [0014]
• DE 19902508 A1 [0014]
• DE 3927746 A1 [0014]
• DE 10100249 A1 [0014]
• DE 4012906 A1 [0014]
• EP 0213057 A1 [0014, 0015, 0019]
• DE 4013764 A1 [0014]
• DE 4014475 A1 [0014]
• WO 2010/133387 A1 [0014]
• EP 1283182 A1 [0035]

Cited non-patent literature

• "Continuous conveyor" by Pajer, Kuhnt and Kurth, 4th, heavily edited edition, VEB Verlag Technik Berlin, 1983 [0026]

Claims (11)

Device for continuous and non-destructive monitoring of a conveyor system ( 1 ) with the following components: - an endless closed conveyor belt ( 2 ) with a support-side cover plate ( 3 ) and running side cover plate ( 4 ) each of a polymeric material having elastic properties and with an embedded tensile member; - Drums ( 5 . 6 ), Carrying rollers and shoring, wherein the aforementioned components in conjunction with the conveyor belt ( 2 ) a material-conveying upper run (A) with a feed point ( 7 ) and discharge point for the conveying material and a material-conveying or material-free lower run (B) form; A conductor loop package ( 8th . 14 ) with endlessly closed conductor loops ( 9 . 10 . 15 . 16 . 17 ) in the conveyor belt ( 2 ) is embedded; and - an electronic slot protection system for non-contact detection of damage to the conveyor belt ( 2 ), wherein the slot protection system is an electrical device system comprising at least one interrogation station ( 11 ) and at least one slot monitoring station ( 12 ) and thereby to a central control ( 13 ) connected to the entire conveyor system ( 1 ) controls; characterized in that the conductor loop package ( 8th . 14 ) at least two sequential conductor loops ( 9 . 10 . 15 . 16 . 17 ), which are arranged one after the other in the longitudinal direction of the conveyor belt at a distance (X), wherein the slot monitoring station ( 12 ) of a sequential slot protection system provides as signal a combination of a first signal for an intact conductor loop and a second signal for a damaged or damaged conductor loop, wherein the sequential slot protection system operates such that upon destruction or damage of a conductor loop with at least one intact conductor loop within the Conductor loop package is accompanied by measures at the next repair and inspection work, while in the destruction or damage of all conductor loops of the conductor loop package the conveyor belt ( 2 ) is stopped. Device according to claim 1, characterized in that in the presence of at least three sequential conductor loops ( 15 . 16 . 17 ) within the conductor loop package ( 14 ) the distance (X) between two conductor loops is the same. Device according to claim 1 or 2, characterized in that the distance between two sequential conductor loops ( 9 . 10 . 15 . 16 . 17 ) is greater than the maximum grain size (d _Kmax ) of the conveying material. Device according to one of claims 1 to 3, characterized in that the conductor loop package ( 8th . 14 ) with the sequential conductor loops ( 9 . 10 . 15 . 16 . 17 ) in the support-side cover plate ( 3 ) and / or running side cover plate ( 4 ) is embedded. Device according to one of claims 1 to 4, characterized in that the conductor loop package ( 8th . 14 ) with the sequential conductor loops ( 9 . 10 . 15 . 16 . 17 ) is reinforced with a transverse reinforcement. Device according to claim 5, characterized in that the transverse reinforcement consists of a textile material. Device according to 6, characterized in that the transverse reinforcement is a textile fabric. Device according to claim 7, characterized in that the textile fabric is a woven, knitted or knitted fabric or a fleece. Device according to claim 8, characterized in that the textile fabric is a fabric. Device according to claim 9, characterized in that the fabric is a polyamide-polyester fabric. Device according to one of claims 1 to 10, characterized in that it is equipped with at least one proximity sensor and / or at least one transponder.

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